Final answer:
Congress has the power to declare war, coin money, and require departmental accounting like that from the Department of the Treasury, but it cannot repeal Supreme Court decisions or decide the specific equipment used by the military.
Step-by-step explanation:
Congressional powers include a wide range of significant authorities granted by the U.S. Constitution. Among these powers are declaring war on another country, which is an exclusive power of Congress as detailed in Section 8 Clause 11. Congress also has the power to coin money, which refers to their authority to issue and regulate the nation's currency. This authority is found in Article I, Section 8, which details the powers to levy and collect taxes, borrow money, regulate commerce, and coin money. Additionally, Congress has the responsibility of requiring a full accounting of departmental actions, such as from the Department of the Treasury, which falls under its oversight and budgetary powers.
However, the power to repeal a Supreme Court decision is not within the powers of Congress; this is a common misconception. The judiciary has its own distinct authority to interpret laws and their constitutionality. Lastly, deciding which airplanes the Air Force will fly is also not a direct congressional power; while Congress has the power of the purse to fund and maintain the military, specific procurement decisions are usually made by the Pentagon and the Department of Defense, although influenced by the budget that Congress approves.